The following video from a recognized industry expert confirms the necessity and wisdom of this pivot.
The speaker is Jeff Geerling, a highly-respected infrastructure expert and author of "Ansible for DevOps." The video's background—his personal server rack—is a perfect illustration of the "Sovereign Core" strategy we are adopting. He provides direct validation for our move:
This directly confirms our strategy: We are acting now to avoid a multi-million-dollar problem later and are correctly using the multi-cloud vendors only for their cheap, best-of-breed storage.